Bia Botal writes:
This has me a little confused, wasn't the last ACARS message a advisory regarding cabin vertical speed. Wouldn't this suggest that the event was well underway, i was always of the impression that this indicated that the pressurization system was warning that it could not keep up with the rate of decent and had little or nothing to do with blocked pitot, am i wrong? if so then i must have missed that discussion some where, if i am not then surely this would indicate that the end was near and so the possible position of the aircraft.
I'm not certain of the question asked, but I always ASSuMEd that message was a 'Depress' message. Not that the cabin was not keeping up (normal descent / increasing pressure / lowered cabin altitude) with a rapid descent (Double Negative), but rather that the cabin was climbing at a triggered alarm rate. From a hull/system breach, or, more likely, the bleed supply insufficiency (idling/compressor-stalled/flameout engines).